Journal
ELECTROCHIMICA ACTA
Volume 275, Issue -, Pages 50-58Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.04.098
Keywords
Battery management system; Model parameters; Electrochemical model; Operating test
Categories
Funding
- National Natural Science Foundation of China [51477037]
- Chinese Scholarship Council (CSC) [[2016] 3100]
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Traditional electrochemical algorithms are too complex for use in real-time battery management systems (BMSs). Determination of parameters and implementation of algorithms are the key challenges for electrochemical models for Li-ion batteries. This paper develops a simplified electrochemical model that incorporates open-circuit voltage, liquid-phase diffusion, reaction polarization, and ohmic polarization, and uses a fast operating test to identify all the parameters to solve these challenges. The model is then implemented and compared against experimental measurements. Validations of parameter estimation and charge/discharge behaviors indicate that the developed parameter estimation method for the electrochemical model is effective. With this model and parameter estimation technique, electrochemical model-based state of charge (SOC) estimation can be realized online and can provide accurate results. (c) 2018 Elsevier Ltd. All rights reserved.
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